#app-text/calibre python_single_target_python3_8 -python_single_target_python3_9 # required by dev-python/PyQtWebEngine-5.15.2::gentoo # required by app-text/calibre-5.13.0::gentoo[python_single_target_python3_9] # required by calibre (argument) >=dev-python/PyQt5-5.15.2 webchannel